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TI-2026-19330 Aliases CVE-2026-23989GHSA-9j2f-3rj3-wgpg

REVA Public Link Exploit

Priority MEDIUM 41CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

REVA is an interoperability platform. Prior to 2.42.3 and 2.40.3, a bug in the GRPC authorization middleware of the "Reva" component of OpenCloud allows a malicious user to bypass the scope verification of a public link. By exploiting this via the the "archiver" service this can be leveraged to create an archive (zip or tar-file) containing all resources that this creator of the public link has access to. This vulnerability is fixed in 2.42.3 and 2.40.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.003 22nd percentileScored 2026-11-07
Fix Fixed reva (opencloud-eu): 2.40.3, 2.42.3github.com/opencloud-eu/reva/v2 (Go): 2.40.3, 2.42.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
opencloud-eurevabefore 2.40.3; 2.41.0 to before 2.42.32.40.3, 2.42.3Patch availableCNA
—github.com/opencloud-eu/reva/v2 (Go)before 2.40.32.40.3Patch availableGHSA-9j2f-3rj3-wgpg
—github.com/opencloud-eu/reva/v2 (Go)2.41.0 to before 2.42.32.42.3Patch availableGHSA-9j2f-3rj3-wgpg
  • reva Vendoropencloud-eu Affected before 2.40.3; 2.41.0 to before 2.42.3 Fixed in 2.40.3, 2.42.3 Patch available CNA
  • github.com/opencloud-eu/reva/v2 (Go) Vendor— Affected before 2.40.3 Fixed in 2.40.3 Patch available GHSA-9j2f-3rj3-wgpg
  • github.com/opencloud-eu/reva/v2 (Go) Vendor— Affected 2.41.0 to before 2.42.3 Fixed in 2.42.3 Patch available GHSA-9j2f-3rj3-wgpg

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:heinlein:opencloud_reva:*:*:*:*:*:*:*:*before 2.40.3; 2.41.0 to before 2.42.3VulnerableHeinlein
  • cpe:2.3:a:heinlein:opencloud_reva:*:*:*:*:*:*:*:* Versions before 2.40.3; 2.41.0 to before 2.42.3 Vulnerable ·Heinlein

Remediation

  • Fix · CNA reva (opencloud-eu) Fixed in 2.40.3, 2.42.3
  • Fix · GHSA-9j2f-3rj3-wgpg github.com/opencloud-eu/reva/v2 (Go) Fixed in 2.40.3 Advisory →
  • Fix · GHSA-9j2f-3rj3-wgpg github.com/opencloud-eu/reva/v2 (Go) Fixed in 2.42.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23989
  2. 2026-10-03 Alias added: GHSA-9j2f-3rj3-wgpg

References

Patch 1

Advisory 2

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences